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- 23-27← CW2 Question 9 of 10 Determine the forces in members BC and CF of the loaded truss. Enter a positive number if in tension, negative if in compression. FULL HD- d 1080 Type here to search AB=BC = CD DE EFFG F 56°1 E 17 прод 1.3 L 2.8 L O D 3.0 L 0/10 E : 27°C T-storms Question 6 Numeric Fill in th Blank with Units Question 7 Numeric Fill in t Blank with Units Question 8 Multistep Viewing Question 9 Numeric Fill in Blank with Unit Question 10 Numeric Fill in t Blank with Unit Da4. Certain frictional forces have magnitude proportional to the square of the velocity of the moving object. Thus |Ffriction| = -yv² for some positive constant y. Here there is an annoying sign issue since the frictional force must have sign opposite to the velocity. One can write Felastic = -y|v|v. If an object of mass m is subject to this frictional force and no other forces, and the initial velocity is positive, then the velocity will always be positive and we can just say Ffriction Then the position y of the particle satisfies the equation -yo?. dy dt2 2 dy +y dt = 0. Write out a solution of this equation for the initial conditions y(0) = Yo, (dy/dt)(0) the substitution u = = vo. Hint: The equation reduces to first order. Use dy/dt and solve the first order equation to get u. Then integrate u to get y.
- A Water Tank That Needs Cleaning 11 of 18 I Review I Consta A cylindrical open tank needs cleaning. The tank is filled with water to a height ho = 1.00 meter, so you decide to empty it by letting the water flow steadily from an opening at the side of the tank, located near the bottom. The cross-sectional area of the tank is Aj = 0.785 square meters, while that of the opening is A2 = 0.002 square meters. Part A %3D How much time t/2 does it take to empty half the tank? (Note: A useful antiderivative is 1/2 da = 2x/2) Express your answer numerically in seconds. Take the free-fall acceleration due to gravity to be g = 9.81 meters per second per second. %3D • View Available Hint(s) ? t1/2 = Submit Nex Provide Feedback MacBook Air DII DD 000 esc F9 F10 FL F4 F5 F6 F7 FB F2 F3 F1 * @ %23 %24 3 5 8 9 * 00substance breaks down by a stress of (106 N)/m2. If the density of the material of the wire is 3×(103) kg/m3, then the length of the wire of the substance which will break under its own weight when suspended vertically will be ___________ a) 66.6m b) 60.0m c) 33.3m7) A particular gasoline tank can hold 51 kg of gasoline when full. What is the depth, in meters, of the tank if it is a rectangular box 0.45-m wide by 0.75-m long? The density of gasoline is typically 0.680 × 103 kg/m3.
- س 5/ 2 درجة Man with mass of (10 Kg ) standing on the one leg has a (1 M) shaft of bone with average cross-sectional area of ( 4 cm^2 ) find the amount of shortening in this bone(1.8 x 10^10 N/m) A. 4-^10*0.138 В. 4-^10 C. 4-^10*0.231 D. 4-^10*36. Two wires A and B with circular cross sections are made of the same metal and have equal lengths, but the resis- tance of wire A is three times greater than that of wire B. (i) What is the ratio of the cross-sectional area of A to that of B? (a) 3 (b) √3 (c) 1 (d) 1/√3 (e) (ii) What is the ratio of the radius of A to that of B? Choose from the same pos- sibilities as in part (i). 7. A metal wire of resistance R is cut into three equal pieces that are then placed together side by side to form a new cable with a length equal to one-third the original length. What is the resistance of this new cable? (a) R (b) R (c) R (d) 3R (e) 9R 8. A current-carrying ohmic metal wire has a cross-sectional area that gradually becomes smaller from one end of the wire to the other. The current has the same value for each section of the wire, so charge does not accumulate OPPO A52 2022/06/12 22:43 13Calculate the mass of a solid gold rectangular bar that has dimensions /wh = 5.50 cm x 12.0 cm x 30.0 cm. (The density of gold is 19.3 x 103 kg/m³.) kg Need Help? Master It Additional Materials eBook
- 2. The pin at A has a diameter of 0.25 in. If it is subjected to double shear, determine the average shear stress in the pin. -2 ft +2 t- 3 ft 600 Ib B3)112) Determine the shear capacity, øVc, for a one foot- wide design strip for a solid one-way slab 8 in. deep of normal weight concrete. f'c=3 ksi, fy= 40 ksi, d= 6.94 in.